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TI-2026-44086 Aliases CVE-2026-61511GHSA-43hg-f3wj-j2m6

vBulletin < 6.2.2 Eval Injection RCE via vb5/template/runtime.php

Priority HIGH 81CWE-95Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-95.

Summary

vBulletin 5.x through 5.7.5 and 6.x through 6.2.1 contains an eval injection vulnerability in the vB5_Template_Runtime::runMaths() method within the template runtime that allows unauthenticated remote attackers to execute arbitrary PHP code by supplying crafted input through the pagenav[pagenumber] parameter. Attackers can exploit the insufficiently restrictive regex filter by using phpfuck-style encoding with permitted characters to inject and execute arbitrary PHP code via the unauthenticated ajax/render template route without any authentication.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.05607 92nd percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA
Fix Fixed vBulletin (vBulletin): 6.2.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
vBulletinvBulletin5.0.0 – 5.7.5; 6.0.0 – 6.2.16.2.2Patch availableCNA
  • vBulletin VendorvBulletin Affected 5.0.0 – 5.7.5; 6.0.0 – 6.2.1 Fixed in 6.2.2 Patch available CNA

Remediation

  • Fix · CNA vBulletin (vBulletin) Fixed in 6.2.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-61511
  2. 2026-10-03 Alias added: GHSA-43hg-f3wj-j2m6
  3. 2026-10-14 CISA SSVC decision points changed
  4. 2026-10-14 Priority changed: MEDIUM → HIGH
  5. 2026-11-03 CISA SSVC decision points changed

References

Exploit 2

Other 2

  • TI-2020-13248 vBulletin 5.5.4 through 5.6.2 allows remote command execution via crafted subWidgets data… KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-12540 vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code]… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-31014 vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to… CVSS 3.1CRITICAL 10.0
  • TI-2020-10114 vBulletin before 5.5.6pl1, 5.6.0 before 5.6.0pl1, and 5.6.1 before 5.6.1pl1 has incorrect access control. CVSS 3.1CRITICAL 9.8
  • TI-2023-10600 vBulletin before 5.6.9 PL1 allows an unauthenticated remote attacker to execute arbitrary… CVSS 3.1CRITICAL 9.8
  • TI-2016-05317 SQL injection vulnerability in forumrunner/includes/moderation.php in vBulletin before… CVSS 3.0CRITICAL 9.8
See all 52 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences